Hint: If you buy Keep This Quiet! for i-Pad, some of the 27 illustrations will be in color. All of the HST signature drawings will. I recommend buying the iPad version in iPad, not a Kindle app, because the Keep This Quiet! designer transferred the 27 images individually into the iPad file, resized to fit the iPad page.  This took several hours. I don't think an app can do this mechanically, as before the designer made the adjustments, the illustrations sometimes broke in the middle of the page....